Tree and brush cutter



Sept. 10, 1940. J. K KNIGHT, JR 2,214,334

TREE AND BRUSH CUTTER Filed March 30, 1.937 2 Sheets-Sheet l AttorneysSept. 10, 19 0- J. K. KNIGHT, JR

TREE AND BRUSH CUTTER 2 Sheets-Shea?- 2 Filed larch 50, 1937 InventorL70: csfflf J}.

waoz' ih Attorneys Patented Sept. 10, 1940 v 2 UNITED STATES PATENTOFFICE 2,214,334 I s- 4 TREE AND nausn Curran James K. Knight, J r.,Bartlett, Tex. Application March so, 1937', serial so. 133,908 4Claims.(015 -25) This invention appertains'to newand useful end of each of thearms 9 forreceiving the improvements in heavy duty apparatus forcutreduced endportion of thecorrespondingshearsf ting down trees andbrush. blade IS," the shears blade it being provided with The principalobject of the present invention a suitable number --of openings 16 atthe end 5 is to provide a shears attachment for tractors portion wherebyit may be adjusted with regard I whereby trees and heavy brush can becut down 'to the securing means i! of the yoke M. Each with a minimumexpenditure of time and labor. of the yokes H is secured in place to thecorre- Another important object of the invention is spondingblades i5along with a clevis It. For to provide a cutting apparatus of thecharacter holding the blades lt-li in open position, on

0 stated which will be positive acting, sturdy in elongated extensiblecoiled spring I! has its ends 1. construction and not susceptible to theready secured as at 20 to the clevises ll. To assist in development ofdefects. holding these ends to the arms I and the rear I Another objectof the invention is to provide ends of the blades I5 suitably elevatedand kept a tree shears whereby the force to efi'ect cutting fromsagging, a cross bar 2| is provided on the of the tree is derived fromthe momentum of front of the tractor 5 and spring members 22 theapparatus. extend from the ends of the bar 2| to the clevises Anotherobject of the invention is to actuate i8.

a pair of tree shears by attaching the shear Particular attention isdirected to the confislevers to a track tractor, so that the momentumuratlon of the blades I! in 'plan view as seen in W of the tractor willbe applied to pivot the shears Fig. 1. Each blade has the configurationof an :0

when they engage an object to be cut. isosceles triangle having a shortbase and where Another object of the invention is to maniputhe cutteredge is along the short leg or base of late a pair of shears with apower vehicle. the triangle, the pivot 21 is substantially atone Theseand various other important objects and end of the base and-theconnection openings ll advantages of the invention will become appararenear the apex of the similar long legs of' ent to the reader of thefollowing specification. the triangle. In the drawings: A 'caster wheel23 is provided in connection Figure 1 represents a top plan view. of thewith each ofthe blades l5 and the large ends of cutting apparatusshowing the shears in open the bladesare sharpened or otherwise provided0 position. with cutting edges 24 the rear ends of which. Figure 2represents a side elevational view of are enlarged as at 25-26 andpivotally secured the shears and tractor. together as at 21. Theenlarged portion 26 is a Figure 3 is a top plan view of the assemblypreferably grooved to afford a receiver for the showing theshearsinclosed position. spring l9 when the blades I! assume the closed5 Figure 4 is a fragmentary top plan view of one position shown inFigure 3.

of the trunnions. It can now be seen, that as the tractor pro- Flgure 51S Perspective w Of 0118 Of h gresses toward the object such as a treeor brush arm connectors; which is to be cut, the pivotal point or thecut- Refemng t0 the drawings wherein like 1111' ting edges of theconnected blade will strike the l merals designate like parts, it can beseen that object and as the shears assembly Wm then numeral 5 generallyrefers to the tractor which imam stationary against the tree tractor mig i g 6 on a: opsposite i pushing iorward due to either its momentum orereo n 658 mem rs are p es its power will cause the reduced end portionsof 1 from which laterally extend the t! minions a the blades to moveforwardly because the force a projecting in outboard direction. 11 d tth m b m tr t thr h m 4;- At each side of the tractor is an arm 9 whichis app 6 0 e y 6 ac or on: e

is provided with a reduced end extension 9' for a bus 9 resulting in thebringing gather of the disposition within the bifurcated portion ill ofcutting edges 24 or the blades with the result the connector II, whichconnector is provided that the oblectis sheared I I with a transverselyextending bore l2 for re- It seems clear that suflicient l tera movesoceiving the corresponding trunnion 8. A cotter ment of the outer endsofthe blades is perkey or the like l3 disposed through the trunnion mitteddue to the pivoting of the arms I to the prevents displacement of theconnector II from connection it and that a tremendous force can thetrunnion. be applied to the shears due to the momentum A yoke member IIis provided at the forward of the massof the tractor as well as thepower is v thereof if the power is continued after the impact of theblades against the tree.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having described the invention what is claimed as new is: j

1. A cutter of the character described comprising a track tractor, apush bar pivoted to each side thereof, a shear blade pivoted to theforward end of each bar, and a. common pivot for both of said shearblades so that when said blades are driven against an object themomentum of said tractor is applied through said bars to said blades topivot them'for cutting of the object.

2. A tree or brush shears to be operated by a power vehicle comprising apair of blade members having inner and outer ends, means to pivot theouter ends to said vehicle, means to pivot the inner ends of the bladestogether so that when an immovable object is engaged by the blades themovement of the inner pivot with the vehicle is stopped while thevehicle continues to travel and force the outer ends forwardly to pivotthe blades about the stopped inner pivot.

3. A tree shears including a power vehicle to carry the shears, a pairof blade members having the outer end of each blade pivoted tothevehicle, a movable pivot connecting the inner ends 01' the bladestogether and positioned to be stopped by an immovable object to besheared so that as the vehicle carries the ends of the blades forwardlythe object will be sheared.

' 4. A tree shears including a pair of blade members, a pivot supportedby the inner ends of said blade members, means to carry the shearsagainst an immovable object to stop the travel of the pivot relative to'said means, and additional means to pivot the outer ends of said blademembers to the carrying means so that thecontinued travel thereof willturn the blades about the stopped pivot to shear the object. 1

K. KNIGHT, JR.

